I find myself agreeing with neroanatomist again.

I am a hobbyist and only this year really started really using my camera. I have a 550D (t2i) , so similar to your new purchase. you can get great pictures with that camera body. Consider renting a L series lens for special events, you will see the difference.
A wedding is a huge event for many people, and I'm sure there are some without budget to hire a pro. I think there will be a market for people that would be happy to have anyone at their event. But it would be a really good idea to work as a second or third shooter for a while, even if all you get out of it is experience.